Fixed the a11y issue in layout AUTOLAYOUT_TITLE_2CONTENT_CONTENT
now the selection via keyboard works as requested

Change-Id: I034776393c8cca68d5cb3702f12111a057d4134b
Reviewed-on: https://gerrit.libreoffice.org/45907Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>